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Equis' Standard Error Bottom Band can be written this way:
STEBandBot(C,21,2,S,3)
The plots are identical to the complex posted formula.
jose '-)
--- In Metastockusrs@xxxxxxxxxxxxxxx, Philip Schmitz <pschmi02@xxxx>
wrote:
> Greetings All,
>
> I like to experiment with different period standard errors bands,
plotting
> the higher or the lower band by themselves. I assume that the only
> alterations I would need to make in the following formula (copied
from the
> equis collection) is to change all of the "21s" to, say "13s" or
"34s" etc.
> But what about that "19" at the end of the formula. Could someone
explain
> how that would have to be changed. The smoothing factor of "3" I
will
> simply leave as is for the moment.
>
>
> 21 period Lower Band (smoothed):
>
> Mov((21 * Sum(Cum(1) * C,21) - Sum(Cum(1),21) * Sum(C,21)) / (21 *
> Sum(Pwr(Cum(1),2),21) - Pwr(Sum(Cum(1),21),2)) * Cum(1) +(Mov(C,21,
S) -
> Mov(Cum(1),21,S) * (21 * Sum(Cum(1) * C,21) - Sum(Cum(1),21) *
Sum(C,21))/
> (21 * Sum(Pwr(Cum(1),2),21) - Pwr(Sum(Cum(1),21),2))) -
> 2*(Sqrt(((Sum(Power(C,2),21)-(Power(Sum(C,21),2)/21)) -((Sum(Cum(1)
*C,21))-
> ((Sum(Cum(1),21) * Sum(C,21)/21))) / ((Sum(Power(Cum
> (1),2),21))-(Power(Sum(Cum(1),21),2)/21))*((Sum(Cum(1)*C,21))-
> ((Sum(Cum(1),21)*Sum(C,21)/21)))) /19)),3,S)
>
> Best regards,
> Philip
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